CVE-2026-46411

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and therefore causes a server abort. This issue has been patched in version 1.26.2.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
21.9%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 10, 2026

Advisory Details (3)

Auto-updated Jun 13, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Client can trigger uncaught exception on FlashMQ 1.26.1 and older · Advisory · halfgaar/FlashMQ · GitHub

https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-g35r-265r-rxrh
github_release Patch Available

FlashMQ 1.26.2

Patch available: halfgaar/FlashMQ v1.26.2

https://github.com/halfgaar/FlashMQ/releases/tag/v1.26.2
github_commit Patch Available

commit 29e08f7b97b6 (halfgaar/FlashMQ)

Patch available: halfgaar/FlashMQ v1.26.2 (contains commit 29e08f7b97b6)

https://github.com/halfgaar/FlashMQ/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 61× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 21:07 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-10 19:22 UTCEG score recompute
  4. 2026-07-09 19:10 UTCEPSS rescore
  5. 2026-07-09 00:14 UTCEG score recompute
  6. 2026-07-07 22:24 UTCEG score recompute
  7. 2026-07-07 13:46 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-05 15:01 UTCEG score recompute
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-04 12:48 UTCEG score recompute
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-03 01:05 UTCEG score recompute
  15. 2026-07-01 23:18 UTCEG score recompute
  16. 2026-07-01 15:07 UTCEPSS rescore
  17. 2026-06-30 23:22 UTCEPSS rescore
  18. 2026-06-30 21:31 UTCEG score recompute
  19. 2026-06-29 19:40 UTCEG score recompute
  20. 2026-06-29 14:06 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-28 17:55 UTCEG score recompute
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
Show 41 more
  1. 2026-06-27 16:10 UTCEG score recompute
  2. 2026-06-27 03:08 UTCEPSS rescore
  3. 2026-06-26 14:25 UTCEG score recompute
  4. 2026-06-25 13:49 UTCEPSS rescore
  5. 2026-06-25 12:40 UTCEG score recompute
  6. 2026-06-24 14:05 UTCEPSS rescore
  7. 2026-06-24 10:54 UTCEG score recompute
  8. 2026-06-23 21:33 UTCEPSS rescore
  9. 2026-06-23 21:33 UTCEPSS rescore
  10. 2026-06-23 08:57 UTCEG score recompute
  11. 2026-06-22 14:25 UTCEPSS rescore
  12. 2026-06-22 14:25 UTCEPSS rescore
  13. 2026-06-22 04:23 UTCEG score recompute
  14. 2026-06-21 14:56 UTCEPSS rescore
  15. 2026-06-21 14:56 UTCEPSS rescore
  16. 2026-06-21 01:59 UTCEPSS rescore
  17. 2026-06-21 01:59 UTCEPSS rescore
  18. 2026-06-20 21:16 UTCEG score recompute
  19. 2026-06-19 19:26 UTCEPSS rescore
  20. 2026-06-19 19:26 UTCEPSS rescore
  21. 2026-06-19 18:06 UTCEG score recompute
  22. 2026-06-18 17:52 UTCEPSS rescore
  23. 2026-06-18 17:52 UTCEPSS rescore
  24. 2026-06-18 15:53 UTCEG score recompute
  25. 2026-06-17 17:53 UTCEPSS rescore
  26. 2026-06-17 13:37 UTCEG score recompute
  27. 2026-06-16 17:53 UTCEPSS rescore
  28. 2026-06-16 11:51 UTCEG score recompute
  29. 2026-06-15 17:49 UTCEPSS rescore
  30. 2026-06-15 10:06 UTCEG score recompute
  31. 2026-06-14 08:21 UTCEG score recompute
  32. 2026-06-13 23:00 UTCEPSS rescore
  33. 2026-06-13 06:35 UTCEG score recompute
  34. 2026-06-12 23:12 UTCEPSS rescore
  35. 2026-06-12 23:12 UTCEPSS rescore
  36. 2026-06-12 04:49 UTCEG score recompute
  37. 2026-06-11 14:00 UTCEPSS rescore
  38. 2026-06-11 03:04 UTCEG score recompute
  39. 2026-06-10 22:18 UTCEPSS rescore
  40. 2026-06-10 01:18 UTCEG score recompute
  41. 2026-06-10 01:17 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-46411?
CVE-2026-46411 is a medium vulnerability published on June 10, 2026. FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and…
When was CVE-2026-46411 disclosed?
CVE-2026-46411 was first published in the National Vulnerability Database on June 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46411 actively exploited?
CVE-2026-46411 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 21.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46411?
CVE-2026-46411 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-46411?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46411, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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